i would like to get the solution of this quesiton

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Kshitij · Accepted Answer

(i) Given that,
 where 
 
Differentiating both sides….
(
As , so
(ii) Given that;
As per law of conservation of energy;
Dividing and removing mass m in both sides, we get
Substituting v from above equation and  
Rearranging above equation proves that;

i would like to get the solution of this quesiton

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